Add embeded patch and system provided package (see x11)

I also found the LTO (Link Time Optimization) in GCC causes Cairo failed to
compile, so disable it for the time being.

X11 package should be provided system, so PACKMAN just checks if it is
installed. If not, it will prompt for installing one.
Merge branch 'master' of https://github.com/dongli/packman

Conflicts:
	framework/package.rb
	packages/fontconfig.rb
Fix a git mistake